7. The radius of a cylinder whose curved surface area is 2640 2 and height 21 cm is . (a) 100 ° (b) 50° (c) 80° (d) 90°

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.

What is 1/3x5 on anuber line what does it look like on a number line

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square